One thing that people hate about robot vacuum cleaners is that you still need to empty their filthy collection containers manually. Well, the new Roomba i7+ from iRobot solves this problem. Finally. The i7+ has an oversized dock that transfers dust and debris into a larger container with disposable waste bags. Robot vacuums have to be small enough to squeeze into tight spaces and clean under furniture, but this means that their onboard dust bins can’t be very large.